Other scholars who reported unanimity regarding the prohibition of swearing by other than Allah include Imam Abu `Umar ibn `AbdulBar AlNamiry (may Allah be merciful with him). Some other scholars, however, deemed it reprehensible, and, thus, it should be considered as prohibitively reprehensible according to the texts and favorable judgment of scholars. On the other hand, some scholars deemed it as somewhat allowable on account ofthe report related in Sahih Muslim that the Prophet (peace be upon him) said regarding the one who asked him about the laws of Islam, By his father, he shall succeed if he were true (to what he professed).
The answer to such a claim is that it is a Shadh narration (not in line with the narration of other trustworthy narrators in terms of wording, chain of narrators, or both) that contradicts Hadith Sahih and thus no action should be based on it. Besides, such a ruling is a Shadh one according to religious scholars, as the narrator of it contradicts the majority of trustworthy narrators. Rather, it is likely that the wording involves distortion, as is stated by Ibn `AbdulBar (may Allah be merciful with him), and that the correct wording is "By Allah, he shall succeed if he were true (to what he professed)." It, thus, could be that some scribes or narrators distorted the original wording or that the Prophet (peace be upon him) said that before the proscription of swearing by other than Allah (Exalted be He) was revealed. Anyway, this is a Shadh single narration, and it is not permissible for the one who believes in Allah and in the Day of Resurrection to hold by it and contradict the Hadith Sahih that clearly indicate the prohibition of swearing by other than Allah and that it is a forbidden act that is tantamount to Shirk.
Moreover,AlNasa'y relatedthrough an authentic Sanad from Sa`d ibn Abu Waqqas (may Allah be pleased with him) that he swore by AlLat and Al`Uzza, and thus he asked the Prophet (peace be upon him) about that. The Prophet (peace be upon him) then replied: Say, "La ilaha illaAllahu wahdahu la sharika lahu lahulmulku walahulhamdu wahuwa `alakully shay'in qadir (There is no deity but Allah, He is One and there is no associate with Him, to Him belongs all sovereignty and praise and He is over all things omnipotent)", then spit three times to your left, seek refuge with Allah from Satan, and do not do that again.
This expression stresses the strict prohibition of swearing by other than Allah, indicating that it is an act of Shirk and one of the incitements of Satan. This expression also implies a clear prohibition of returning to such an act. I ask Allah to grant us and you understanding of religion, and uprightness of objective and action, to safeguard us and the Muslims from following personal vain desires and the incitements of Satan for He is AllHearing, Ever Near (to all things). Assalamu `alaykum warahmatullah wabarakatuh (May Allah's Peace, Mercy, and Blessings be upon you!)